"StatusNet is an exception in the enterprise market," writes ReadWriteEnterprise's Alex Williams. "It's an open-source software project, started by members of the open source and wiki communities."

"The enterprise service is priced on an annual basis. It ranges in cost from $1,000 to $10,000 per year," Williams writes. "Customers get access to different levels of service based on package they choose to purchase. For example, at the $1,000 level package, the service includes access to the forums. It includes email support and response time within one day. A $10,000 package includes six hours of best practice consulting and response within one hour to support requests."